Hi Robert, The Sony recorder has built-in memory. It doesn't use disks or cassettes. You record things on the recorder's built-in memory and then transfer them to the PC. I like the fact that I never have to look for blank media to make a recording. It has a lot of recording time (I want to say about 10 hours at the best-quality setting and about 15 hours at the lower- quality setting), so there is little chance that I will have it completely full. Angie On Tue, 22 Mar 2005 13:21:47 -0800, Robert Acosta wrote: >Angie, Do you record your books on disks or on cassettes from you Sony >recorder?